Physiological signal detector



FIG. 1 is a perspective view of a physiological signal detector of the new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a front elevation view thereof in an environment of use.

The additional broken lines shown in FIG. 8 illustrate environment and form no part of the claimed design.

The broken lines shown in FIGS. 1-8 illustrate portions of the physiological signal detector that form no part of the claimed design. 

CLAIM The ornamental design for a physiological signal detector, as shown and described. 